mockCdmFromTables       Creates a mock cdm_reference from a preexisting
                        cdm_reference object (it can be empty) and a
                        list of tables. It makes sure that all the
                        observations are within observation and all
                        individuals are present in person table.
mockCdmReference        Function to create empty cdm reference for mock
                        database
mockCohort              Function to generate synthetic Cohort
mockConcepts            function to add mockconcept et to concept table
mockConditionOccurrence
                        Function to generate condition occurrence table
mockDeath               Function to creat mock death table
mockDrugExposure        Function to generate drug exposure table
mockMeasurement         Function to generate measurement table
mockObservation         Function to generate observation table
mockObservationPeriod   mockObservationPeriod
mockPerson              mockPerson
mockVocabularyTables    It creates a mock database with the vocabulary.
